Mortising-tool.



No. 807,799. PATENTED DEC. 19, 1905. O. U. WYSONG.

MORTISING TOQL.

APPLICATION FILED NOV. 5, 1904.

\I L 014M040 I WITNESSES IIYVE/VTO/i 1 8, ifiw ATTORNEY OLMEDO OORTEZ WYSONG, OF GREENSBORO, NORTH CAROLINA.

IVIORTISING-TOOLQ Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed November 5,1904. Serial No. 231,480-

To all whom, it may concern:

Be it known that I, OLMEDO Oonrnz WY- SONG, a citizen of the United States, residin at Greensboro, in the county of Guilford an State of North Carolina, have invented new and useful Improvements in Mortising-Tools, of which the following is a specification.

My invention relates to improvements in mortising-tools. One of its objects is to provide a simple, strong, durable, and readily-adjustable tool which may be advantageously em 7 loyed in a gang-mortiser, where the severa tools requireto be adjusted into alinement.

It further consists incertain details of form, combination, and arrangement, all of which will be more fully set forth in the description of the accompanying drawings, in which Figure 1 is a central vertical section through my improved tool and its supporting-yoke. Fig. 2 is a perspective viewof the tool detached. Fig. 3 is a perspective view of the locking-collar. Fig. 4 is a central vertical section through the tool detached. Fig. 5 is a view, partly in section, of a modification.

A represents the yoke or frame in which the tool is supported. It is often desirable to employ several of these yokes side by side, in which case the forward ends of the tools are regpired to be adjusted into alinement.

represents the bit or augur which rotates in the bore of the mortising-chisel C and is driven by means of shaft 1) and pulley E. The blade 6 of the chisel is rectangular in cross-section and the forward end 6 sharpened, so as to be forced into the work to cut out the corners and form a square hole out of the round hole cut by the bit.

f represents slots through two sides of the shank 6, through which the cuttings or chips escape.

The stock or shank F of the chisel is of increased diameter and screw-threaded to register with a screw-threaded recess G in the yoke. A screw-threaded collar H is fitted to the chisel outside the yoke and adapted by being tightened against the face of the oke after the chisel has been adjusted to ho d or look the chisel in place.

it represents recesses to receive a spannerwrench.

The enlarged portion F gives a diameter and permits a threading so proportionate to the cross-section of the cutting portion of the chisel as to resist the strains due to the impact of the chisel without injuring or jamming the threads, and the collar H when screwed up against the end of the yoke affords a further contact-surface for transmitting the power or motion of the yoke to the chisel, and boththese provisions make it possible to adjustably secure the chisel by a threaded connection without such risk of jamming or stripping of the threads in the operation of the machine as would prevent a ready removal or adjustment of the chisel, as might occur if the collar were not employed or the jzhreagled portion of the chisel were not enarge In the modification Fig. 5 a screw-threaded sleeve K seats in the recess G and is held to its adjusted position by collar L. The chisel M has a stem N, seating in a recess n in the sleeve K, and a shoulder m, abutting against the end of sleeve K.

Having described my invention, what I claim is 1. In combination with the yoke of a reciprocating chisel and auger mortising machine, a rotary bit, a hollow chisel having an enlarged threaded portion engaging with a socket in said yoke to permit endwise adjust.- ment of said chisel relative to said yoke, and a screw-threaded collar on said threaded portion acting both as an adjustable shoulder to transmit the pressure of the yoke to the chisel and to lock the chisel to the yoke.

2. A hollow mortising-chisel for use in reciprocating chisel and auger mortising machines, consisting of a blade of the cross-sectional pattern to be out, a cutting edge formed at the forward end of the blade, a central axial recess to receive arotary bit, an enlarged integral screw-threaded shank to enga e a threaded recess in the mortising-mac 'ne yoke, and a collar threaded to said shank to form an adjustable shoulder to sustain the thrust of the yoke, and to lock the chisel to the yoke.

In testimony whereof I have afiixed my signature in presence of two subscribing witnesses.

OLMEDO CORTEZ WYSONG. Witnesses:

OLABoRN F. Moon, GAITHAN F. OAKERY. 

